Steps to reproduce:

1. Import an stl model into Chitubox.

2. Add supports manually

3. Duplicate the model a couple of times to fill the build plate.

4. Save the project

5. Reopen the project.

6. Add another support manually

Result:

Chitubox now freezes for a moment and crashes without any error message.

This only happens after a certain number of supports are added - hence step 3.

This happens in version 1.63 and 1.61, but NOT 1.5.